Kenwood R-SG7 Service Manual
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Kenwood R-SG7 Service Manual

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See also: Instruction Manual
STEREO INTEGRATED AMPLIFIER/TUNER
R-SG7/SG7G

SERVICE MANUAL

SUB panel *
Panel *
(A22-)
(A60-)
604
stereo integrated amplifier/tuner
phones
on/standby
641
Knob
(K29-6741-04)
AC cord *
AC cord bushing
(E30-)
(J42-0083-05)
SPEAKER
(6 – 16 Ω)
Lock terminal board
(E70-0034-05)
Indicator
(B12-0368-04)
603
volume
control
∞
down
612
Front glass
(B10-2373-03)
Metallic cabinet
(A01-3470-11)
SUB
WOOFER
PRE OUT
R
L
R
L
IN
CD
AUX
Phono jack
Phono jack
(E63-1014-05)
(E63-0136-15)
© 1999-7/B51-5549-00 (K/K) 2299
Escutcheon
(B07-2457-03)
614
611
pure
∞
up
640
Knob
(K29-6358-14)
Lock terminal board
(E20-0476-05)
FM75Ω
AM
FM300Ω
GND
IN
REC OUT
PLAY OUT
REC OUT
PLAY OUT
TAPE
MD
* Refer to parts list on page 23.
Knob
(K29-7570-03)
642
pure
N.B./tone
enter
input selector
fi
%
turning
band
auto/mono
613
Indicator
(B12-0320-04)
Rectangular receptacle
(E08-0312-05)
SYSTEM
ANTENA
CONTROL
Phono jack
(E63-0047-15)
70%

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Summary of Contents for Kenwood R-SG7

  • Page 1: Service Manual

    STEREO INTEGRATED AMPLIFIER/TUNER R-SG7/SG7G SERVICE MANUAL © 1999-7/B51-5549-00 (K/K) 2299 SUB panel * Panel * Indicator Escutcheon Knob (A22-) (A60-) (B12-0368-04) (B07-2457-03) (K29-7570-03) stereo integrated amplifier/tuner pure volume pure N.B./tone control enter input selector fi turning band phones ∞ ∞...

  • Page 2: Table Of Contents

    R-SG7/SG7G CONTENTS / ACCESSORIES Contents CONTENTS / ACCESSORIES ........2 SCHEMATIC DIAGRAM .......... 11 CIRCUIT DESCRIPTION ..........3 EXPLODED VIEW ............22 ADJUSTMENT ............7 PARTS LIST..............23 PC BOARD ..............8 SPECIFICATIONS ........Back cover Accessories AM loop antenna (1) FM indoor antenna (1)

  • Page 3: Circuit Description

    R-SG7/SG7G CIRCUIT DESCRIPTION 1. INITIAL STATE The microcomputer is reset when the AC power is turned ON. The data for backup state comfirmation is checked (1) AMP related block by reset processing. The microcomputer is initialized • POWER ......OFF when the data was destroyed. If it is not destroyed, the •...
  • Page 4 R-SG7/SG7G CIRCUIT DESCRIPTION 3 Set the TUNER ATT to ON and the display S level in 5. TEST MODE hexadecimal when the [ENTER] key is pressed. (ATT ON 5-1 AMP test mode using main unit's keys is displayed in the fluorescent display indicator.) •...
  • Page 5 R-SG7/SG7G CIRCUIT DESCRIPTION 6. Microprocessor : uPD78045FGF071(X09-IC11) 6-1 Microprocessor periphery block diagram X09,ED1 FL DISPLAY(FIP9GM6R) RESET KEY MATRIX REMOCON LEVEL IN FL GRID CLASS A LED BIAS MID IC11 X05,IC2 BIAS HI PLL IC (LC72131) LOW RELAY HI RELAY uPD78045FGF071...
  • Page 6 R-SG7/SG7G CIRCUIT DESCRIPTION 6-2 Pin description Pin No. Pin Name Description Active 7G~1G FL grid7~1. Microprocessor power supply (+5V). E2PROM SCL E2PROM control clock. E2PROM SDA E2PROM control data. 11,12 Unused. A CLASS ON POWER ON/OFF control signal. H : ON...

  • Page 7: Adjustment

    R-SG7/SG7G ADJUSTMENT FM SECTION SELECTION :FM X05-4882-70 (E/T TYPE) INPUT OUTPUT TUNER ALIGNMENT ITEM ALIGN FOR FIG. SETTINGS SETTINGS SETTINGS POINTS Connect a DC L 31 voltmeter 98.0kHz MONO DISCRIMINATOR between 1kHz, ±75kHz dev. 98.0MHz Pin 1 and Pin 2 L 32 Minimum distortion.

  • Page 8: Pc Board

    PC BOARD (Component side view) TUNER UNIT (X05-4860-71) : M TUNER UNIT (X05-4882-70) : ET Refer to the schematic diagram for the value of resistors and capacitors.

  • Page 9: (A70-1154-05) : M

    PC BOARD(Component side view) X09 E/7 X09-4690-22 A/7 : M 2-72 : ET R126 C121 REC BUFF C120 R700 W106 W204 C709 SGND SGND R127 SYSTEM BUSY BUSY C704 SDATA CONTROL 12V AVR R701 C706 L701 C703 R704 R130 R702 W301 C705 W221...
  • Page 10 TUNER UNIT (X05-4860-71) : M TYPE +12V +12V 5.1V C3 4P AM ANT 1/4W 0.01 4.7K 4.2V 22K(B) FM 300 FM 75 2.1V FM/AM SYSTEM TUNE 2.5V(0.4V) 10.3V 0V(2.7V) 1/4W 11.6V 10.5V ST:0V 1.9V MONO:4.7V 0V(0.6V) FM/AM 1.2V FM IF 5.1V FM FRONT-END A1 (W02-2608-05)
  • Page 11 To reduce the risk of electric shock, CH SPACE leakage-current or resistance measurements shall 10u16 10u16 be carried out (exposed parts are acceptably 3.3K insulated from the supply circuit) before the appliance is returned to the customer. (2/2) R-SG7/SG7G R-SG7/SG7G (1/3) Y05-3960-21...
  • Page 12 TUNER UNIT (X05-4882-70) : (E,T)TYPE 0.01 R69 10K A1 FM FRONT END(W02-2565-05) AM ANT DISTORTION (ST) J2 0 VT 5 RF AMP FM 75 9.9V 100K 7 GND : 2SK360 IF-OUT 3.3K 0.01 : 2SC2620QB BUFFER TR3~5 : 2SC2413K or 2SC2778 OSC 6 D1~3 : 1SV225 or HVM16...
  • Page 13 POWER CONTROL DETECTOR 12.3V RESET 1.2K UNIVERSAL COUNTER Q102 Q103 R101 C B I/F DATA SHIFT REGISTER LATCH 11.5V (12.0V) 2.5V D101 3.6V R84 10K MUTE ON:0V MUTE OFF:4.8V C92 470P 0V(9.7V) +12V R-SG7/SG7G (2/3) 12.3V +12V +12V R-SG7/SG7G Y05-3960-21...
  • Page 14 AUDIO UNIT (X09-496X-XX) (A/7) CN11 15 14 13 12 11 10 9 9 10 18.5V +20V SLEVEL LEVEL IN -20V R156 4.7K -19.5V T.MUTE 24.0V Q13-16 +24.8V 1.2V PHONES D.GND MUTE +12V +12V +12V 5.6V +5.6V +5.6V +5.6V 1/4W 0.7V F.OFF PLL/SEL DATA R187...

  • Page 15: Parts List

    5:D GND R577 10K R574 1K VOLUME R163 C140 R576 10K R573 1K PHONES CONTROL 2.2K 2200P R582 10K R583 10K S516 R-SG7 (X09-496X-XX) R529 10K R530 DESTINATION C25, C41, C51, C53-56, R49, R97, R159 UNIT No. W2,3 COUNTRY ABB.
  • Page 16 R-SG7 (X09-496X-XX) R-SG7G (X09-496X-XX) DESTINATION D512, C526, W503- DESTINATION C526, D512, W503- UNIT No. D518 C529 UNIT No. D518 C529 COUNTRY ABB. COUNTRY ABB. 0-01 JAPAN JAPAN 0-01 GENERAL MARKET 0-22 JAPAN U.K. 2-72 EUROPE (X09-496X-XX) (D/7) IC11 : uPD78045AGF88...
  • Page 17 : N09-0333-05 (19P) (A/7) (D/7) (15P) (E,T Typeonly) (G/7) (E/7) (15P) (B/7) pure A N.B./tone S501 S504 volume control input selector enter ED 1 S516 S502 S505 tuning S503 S506 phones band WH 5 J501 S507 on/standby R-SG7 auto/mono S508...
  • Page 18 Desti- Ref. No Parts No. Description Ref. No Parts No. Description ress Parts nation marks Parts nation marks ress R-SG7/SG7G M: R-SG7G K29-6358-14 KNOB K29-6741-04 KNOB A01-3470-11 METALLIC CABINET K29-7570-03 KNOB A22-1783-11 SUB PANEL A22-1826-01 SUB PANEL L07-2386-05 POWER TRANSFORMER...
  • Page 19 New Parts New Parts Parts without Parts No. are not supplied. Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Teile ohne Parts No.
  • Page 20 New Parts New Parts Parts without Parts No. are not supplied. Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Teile ohne Parts No.
  • Page 21 New Parts New Parts Parts without Parts No. are not supplied. Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Teile ohne Parts No.
  • Page 22 New Parts New Parts Parts without Parts No. are not supplied. Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Teile ohne Parts No.
  • Page 23 New Parts New Parts Parts without Parts No. are not supplied. Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Teile ohne Parts No.
  • Page 24 New Parts Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Teile ohne Parts No. werden nicht geliefert. Add- Desti- Parts No. Ref. No Description Parts nation marks ress Q60 ,61 2SA1576A(R,S) TRANSISTOR Q60 ,61...

  • Page 25: Specifications

    Dimensions .............. W: 200 mm H: 77 mm D: 249 mm Weight (net) ............... 2.2 kg 1.KENWOOD follows a policy of continuous advancements in development. For this reason specifications may be changed without notice. Notes Notes 2.Sufficient performance may not be possible at very low temperatures (under a water-freezing temperature).

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